ABLIC S-35390A 2-Wire Real-Time Clocks

ABLIC S-35390A 2-Wire Real-Time Clocks feature a low current consumption in a wide operating voltage range of 1.3 to 5.5V. These RTCs can be used for many applications, including as the main supply or backup battery. The S-35390A series allows for longer battery life with 0.25μA current consumption. The clocks have a built-in free user register for backup memory and a built-in correction function. Typical applications for ABLIC S-35390A 2-Wire Real-Time Clocks include mobile game devices, cameras, electronic power meters, TVs, mobile phones, and much more.


  • Low current consumption: 0.25μA typ. (VDD = 3V, Ta = +25°C)
  • 1.3V to 5.5V operating voltage
  • Built-in clock correction function
  • Built-in free user register
  • 2-wire (I2C-bus) CPU interface
  • Built-in alarm interrupter
  • Built-in constant voltage circuit
  • Built-in flag generator during detection of low power voltage or at power-on
  • Auto calendar up to the year 2099, automatic leap-year calculation function
  • Built-in 32.768kHz crystal oscillator (built-in Cd, external Cg)
  • Lead free, Sn 100%, halogen free


  • Mobile game devices
  • Mobile AV devices
  • Digital still cameras
  • Digital video cameras
  • Electronic power meters
  • DVD recorders
  • TVs, VCRs
  • Mobile phones, personal handy-phone systems (PHS)

Block Diagram

ABLIC S-35390A 2-Wire Real-Time Clocks
Published: 2016-03-28 | Updated: 2022-03-11